Steps to reproduce:
1. Create new Unity project
2. Go to PM window and install In App Purchasing package
3. Once package is installed, press "Configure" in PM window
4. In Project Settings > In-App Purchases enable In-App Purchases
5. In Project settings > In-App Purchases scroll down and press “Obfuscate License Keys” button (or twice)
6. Observe the Console window

Actual results: Error is thrown:
{code:java}
“InvalidOperationException: Cannot modify VisualElement hierarchy during layout calculation
UnityEngine.UIElements.VisualElement+Hierarchy.Clear () (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/VisualElementHierarchy.cs:640)
UnityEngine.UIElements.VisualElement.Clear () (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/VisualElementHierarchy.cs:256)
UnityEditor.SettingsWindow.ProviderChanged (UnityEditor.SettingsProvider lastSelectedProvider, UnityEditor.SettingsProvider newlySelectedProvider) (at /Users/bokken/build/output/unity/unity/Editor/Mono/Settings/SettingsWindow.cs:276)
UnityEditor.SettingsTreeView.SelectionChanged (System.Collections.Generic.IList`1[T] selectedIds) (at /Users/bokken/build/output/unity/unity/Editor/Mono/Settings/SettingsTreeView.cs:66)
UnityEditor.SettingsTreeView.FocusSelection (System.Int32 selectedId) (at /Users/bokken/build/output/unity/unity/Editor/Mono/Settings/SettingsTreeView.cs:46)
UnityEditor.SettingsWindow.SelectProviderByName (System.String name, System.Boolean ignoreLastSelected) (at /Users/bokken/build/output/unity/unity/Editor/Mono/Settings/SettingsWindow.cs:111)
UnityEditor.SettingsWindow.RestoreSelection () (at /Users/bokken/build/output/unity/unity/Editor/Mono/Settings/SettingsWindow.cs:242)
UnityEditor.SettingsWindow.InitProviders () (at /Users/bokken/build/output/unity/unity/Editor/Mono/Settings/SettingsWindow.cs:168)
UnityEditor.SettingsWindow.DrawTreeView () (at /Users/bokken/build/output/unity/unity/Editor/Mono/Settings/SettingsWindow.cs:500)
UnityEngine.UIElements.IMGUIContainer.DoOnGUI (UnityEngine.Event evt, UnityEngine.Matrix4x4 parentTransform, UnityEngine.Rect clippingRect, System.Boolean isComputingLayout, UnityEngine.Rect layoutSize, System.Action onGUIHandler, System.Boolean canAffectFocus) (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/IMGUIContainer.cs:403)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr, Boolean&) (at /Users/bokken/build/output/unity/unity/Modules/IMGUI/GUIUtility.cs:219)”
{code}
Expected results: No errors are thrown in the Console

Reproducible with versions: 

4.12.2 (6000.2.0a1, 6000.2.0a6)

Not reproducible with versions: 

4.12.2 (6000.1.0b9)

Tested on (OS): Apple M1 Max, Sequoia 15.2